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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef _MOZILLA_GFX_IMAGESCALING_H
#define _MOZILLA_GFX_IMAGESCALING_H
#include "Types.h"
#include <vector>
#include "Point.h"
namespace mozilla {
namespace gfx {
class ImageHalfScaler
{
public:
ImageHalfScaler(uint8_t *aData, int32_t aStride, const IntSize &aSize)
: mOrigData(aData), mOrigStride(aStride), mOrigSize(aSize)
, mDataStorage(nullptr)
{
}
~ImageHalfScaler()
{
delete [] mDataStorage;
}
void ScaleForSize(const IntSize &aSize);
uint8_t *GetScaledData() const { return mData; }
IntSize GetSize() const { return mSize; }
uint32_t GetStride() const { return mStride; }
private:
void HalfImage2D(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
void HalfImageVertical(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
void HalfImageHorizontal(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
// This is our SSE2 scaling function. Our destination must always be 16-byte
// aligned and use a 16-byte aligned stride.
void HalfImage2D_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
void HalfImageVertical_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
void HalfImageHorizontal_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
void HalfImage2D_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
void HalfImageVertical_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
void HalfImageHorizontal_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize,
uint8_t *aDest, uint32_t aDestStride);
uint8_t *mOrigData;
int32_t mOrigStride;
IntSize mOrigSize;
uint8_t *mDataStorage;
// Guaranteed 16-byte aligned
uint8_t *mData;
IntSize mSize;
// Guaranteed 16-byte aligned
uint32_t mStride;
};
} // namespace gfx
} // namespace mozilla
#endif
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